| .action |
Automator Action |
| .adg |
Ableton Device Group |
| .abp |
AVS Barcode Profile |
| .aifb |
AIF Builder Project File |
| .am6 |
AutoPlay Media Studio 6 Project |
| .am7 |
AutoPlay Media Studio 7 Project |
| .ac$ |
AutoCAD Temporary File |
| .am4 |
AutoPlay Media Studio 4 Project File |
| .am5 |
AutoPlay Media Studio 5 Project File |
| .ald |
Dynamics AX Application Label Data File |
| .ali |
Dynamics AX Label Index File |
| .add |
Dynamics AX Developer Documentation File |
| .ahd |
Dynamics AX Online Help Data File |
| .ahi |
Dynamics AX Online Help Index File |
| .alt |
Dynamics AX Temporary File |
| .aod |
Dynamics AX Object Data File |
| .apz |
Autoplay Media Studio Exported Project |
| .amx |
AMX Mod Plugin File |
| .amxx |
AMX Mod X Plugin File |
| .aob |
DVD-Audio Audio Object File |
| .axm |
AXMEDIS Object |
| .arr |
Amber Graphic File |
| .acs |
Agent Character File |
| .avl |
ArcView Legend File |